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"index_show"><a href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="2ee3scx" class="twoCol"><div id="n787av3" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-_sysqm/">實(shí)驗(yàn)室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?金華2-甲基四氫呋喃多少錢(qián)一個(gè) 上海蔚云化工供應(yīng)</p><div id="3g8hoft" class="leftbox clearfix"><h1>金華2-甲基四氫呋喃多少錢(qián)一個(gè) 上海蔚云化工供應(yīng)</h1><div id="la4qikr" class="proBig"><div id="vpyfhtv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="k74mu2o" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="qztfcoq" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>金華2-甲基四氫呋喃多少錢(qián)一個(gè),2-甲基四氫呋喃</p><p><span>***更新：</span>2021-01-01 04:16:26</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="cr23yah" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海蔚云化工有限公司</a></p><p><span>聯(lián)系人：</span>盛志華</p><p><span>郵箱: </span>3273929241@qq.com</p><p><span>電話(huà): </span>18721726651</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.weiyunhuagong.com</p><p><span>手機(jī): </span>021-52909928</p><p><span>地址: </span>靜安區(qū)靈石路709號(hào)55幢A2113室</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="8b4f7li" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="m3d9hj2" class="box"><p><p style="text-indent:25px">呋喃是很好的富電芳香雜環(huán)，可與金屬形成金屬有機(jī)化合物參與反應(yīng)，可發(fā)生[2+2]光反應(yīng)、[2+3]環(huán)加成、[4+3]環(huán)加成和Diels-Alder反應(yīng)，也可以發(fā)生卡賓反應(yīng)。2-鹵代、酰基、氰基、磺?；汪驶秽暮铣?呋喃作為富電的芳香雜環(huán)可以與很多的親電試劑發(fā)生反應(yīng)，用以制備鹵代呋喃、?；秽鹑A2-甲基四氫呋喃多少錢(qián)一個(gè)、氰代呋喃和其它雜原子取代呋喃等產(chǎn)物 (式1)。一般情況下C-2位比C-3位更容易受親電試劑的進(jìn)攻。烷基呋喃的合成烷基呋喃可由呋喃經(jīng)過(guò)親電取代反應(yīng)制得，金華2-甲基四氫呋喃多少錢(qián)一個(gè)。呋喃發(fā)生Mannich反應(yīng)可生成2-(N,N-二烷基氨基)甲基呋喃衍生物，金華2-甲基四氫呋喃多少錢(qián)一個(gè)，TMSI存在下呋喃也可以與β-酮發(fā)生反應(yīng)。而在Ag+催化下，1,3-二苯基硒丙烷 (式2) 或者氯代環(huán)丙烷可與呋喃發(fā)生烯丙基化。四氫呋喃是芳香族化合物呋喃的完全氫化產(chǎn)物。金華2-甲基四氫呋喃多少錢(qián)一個(gè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華2-甲基四氫呋喃多少錢(qián)一個(gè),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">儲(chǔ)存于陰涼、通風(fēng)的庫(kù)房。遠(yuǎn)離火種、熱源。庫(kù)溫不宜超過(guò)30℃。包裝要求密封，不可與空氣接觸。應(yīng)與氧化劑等分開(kāi)存放，切忌混儲(chǔ)。采用防爆型照明、通風(fēng)設(shè)施。禁止使用易產(chǎn)生火花的機(jī)械設(shè)備和工具。儲(chǔ)區(qū)應(yīng)備有泄漏應(yīng)急處理設(shè)備和合適的收容材料。采用鐵桶包裝。貯存在陰涼、通風(fēng)、干燥的倉(cāng)庫(kù)內(nèi)，嚴(yán)禁煙火。搬運(yùn)時(shí)小心輕放，切勿倒置，避免碰撞。按易燃有毒物品規(guī)定貯運(yùn)。鐵桶包裝，凈重１７０ｋｇ／桶。由2-甲基呋喃催化加氫而得。當(dāng)催化加氫反應(yīng)采用氯化鈀催化劑時(shí)，主要的產(chǎn)品是乙酰丙醇（見(jiàn)00420），但也可回收得到副產(chǎn)品2-甲基四氫呋喃。金華2-甲基四氫呋喃多少錢(qián)一個(gè)四氫呋喃中的過(guò)氧化物可用酸化的碘化鉀溶液來(lái)檢驗(yàn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華2-甲基四氫呋喃多少錢(qián)一個(gè),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png"></div><p style="text-indent:25px">5-二取代的四氫呋喃類(lèi)混合物的制備方法，包括：在多相醚化催化劑、多相氫化催化劑和氫氣存在的條件下，將5-羥甲基糠醛或5-羥甲基糠醛的水溶液與醇混合后發(fā)生醚化還原反應(yīng)得到的液態(tài)中間產(chǎn)物；然后再在第二催化劑的作用下，使得到的液態(tài)中間產(chǎn)物發(fā)生加氫反應(yīng)，得到2，5-二取代的四氫呋喃類(lèi)混合物。該制備方法通過(guò)兩步法實(shí)現(xiàn)5-羥甲基糠醛向目標(biāo)產(chǎn)物的轉(zhuǎn)化，得到的2，5-二取代的四氫呋喃類(lèi)混合物可作為潛在的燃料或者燃料添加劑。含有四氫呋喃的藥物共有13個(gè)。這些藥物涵蓋心血管疾病，傳染病，泌尿系統(tǒng)疾病，ai癥和糖尿病等多種***領(lǐng)域。這些藥物中的四氫呋喃都含有手性中心，其中特拉唑嗪和阿夫唑嗪為外消旋體。另外，有4種藥物含有兩個(gè)四氫呋喃環(huán)，包括地瑞那韋、異山梨醇二硝酸酯、異山梨醇單硝酸酯。天然產(chǎn)物包括伊維菌素、依前列醇及軟海綿素B的合成類(lèi)似物艾日布林。泊沙康唑含有一個(gè)季碳手性中心，其抗***效果優(yōu)于早期的酮康唑等抗***藥，它對(duì)曲霉菌以及對(duì)先前的抗***藥具有抗性的其它******均有效。</p><p style="text-indent:25px">聚四氫呋喃二醇是由四氫呋喃（ＴＨＦ）在陽(yáng)離子引發(fā)下開(kāi)環(huán)聚合而得到的均聚醚，它含有醚鍵，又有相當(dāng)多的規(guī)整排列的亞甲基，以伯羥基為端基，主要用作聚氨酯彈性體的軟段，是聚氨酯的較好原料。非聚氨酯用途包括共聚酯彈性體、聚醚酰胺工程塑料。ＰＴＭＥＧ型聚氨酯彈性體具有較高模量和強(qiáng)度，優(yōu)異的耐水解、耐磨、耐霉菌、耐油性、動(dòng)態(tài)力學(xué)性能、電絕緣性能和低溫柔性等性能，它具有通常的聚酯型聚氨酯彈性體所不能達(dá)到的某些特性，特別是良好的耐水性。PTMEG是一種常用的特種聚醚多元醇，用于注射及擠出熱塑性聚氨酯彈性體（TPU）、澆注型聚氨酯彈性體、聚氨酯纖維紡絲、混煉型聚氨酯彈性體等制造工藝，特別適合用于氨綸、汽車(chē)配件、電纜、薄膜、織物涂層、合成革、醫(yī)療器材、高性能膠輥、耐油密封件、膠黏劑、金屬部件耐磨內(nèi)襯、體育運(yùn)動(dòng)制品，以及用于水下、地下、礦井及低溫場(chǎng)合的制品。彈性體多用于耐水解要求高的場(chǎng)合。四氫呋喃是一種無(wú)色、可與水混溶。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華2-甲基四氫呋喃多少錢(qián)一個(gè),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png"></div><p style="text-indent:25px">四氫呋喃是一種重要的有機(jī)合成原料且是性能優(yōu)良的溶劑，特別適用于溶解PVC、聚偏氯乙烯和丁苯胺，普遍用作表面涂料、防腐涂料、印刷油墨、磁帶和薄膜涂料的溶劑，并用作反應(yīng)溶劑，用于電鍍鋁液時(shí)可任意控制鋁層厚度且光亮。四氫呋喃自身可縮聚成聚四亞甲基醚二醇，也稱(chēng)四氫呋喃均聚醚。PTMEG與甲苯二異氰酸酯制成耐磨、耐油、低溫性能好、強(qiáng)度高的特種橡膠；與對(duì)苯二甲酸二甲酯和1,4-丁二醇制成嵌段聚醚聚酯彈性材料。相對(duì)分子質(zhì)量為2000的PTMEG與對(duì)亞甲基雙二異氰酸酯制成聚氨酯彈性纖維、特種橡膠和一些特殊用途涂料的原料。在有機(jī)合成方面，用于生產(chǎn)四氫噻吩、1.2-二氯乙烷、2.3-二氯四氫呋喃、戊內(nèi)酯、丁內(nèi)酯和吡咯烷酮等。在醫(yī)藥工業(yè)方面，THF用于合成咳必清、利復(fù)霉素、黃體酮和一些藥。THF經(jīng)硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑。THF還可用做合成革的表面處理劑。甲基四氫呋喃是作為綠色溶劑替代四氫呋喃的。蘇州2-甲基四氫呋喃咨詢(xún)電話(huà)</p><p style="text-indent:25px">四氫呋喃是制藥行業(yè)的主要溶屬劑。金華2-甲基四氫呋喃多少錢(qián)一個(gè)</p><p style="text-indent:25px">當(dāng)以2-甲基四氫呋喃為溶劑，Ag2CO3為氧化劑，三甲基環(huán)三硼氧烷為甲基化試劑，Cp*Co(PhH)(PF6)2作為催化劑，可獲得較佳反應(yīng)結(jié)果（Table 1）。對(duì)底物范圍進(jìn)行了擴(kuò)展。反應(yīng)結(jié)果表明，藥物分子中常見(jiàn)的氮雜環(huán)（3a–3e）或者酰胺基團(tuán)（3f–3p），均與體系兼容。一級(jí)酰胺由于缺乏導(dǎo)向基團(tuán)，從而導(dǎo)致具有合成難度，但增加催化劑用量，也可以實(shí)現(xiàn)鄰位的甲基化（3k-3m）。二級(jí)苯甲酰胺（3f-3j）不論是否有立**阻或環(huán)狀，都是很好的底物。三級(jí)酰胺1n 和1o可以選擇性的單甲基化，含溴的底物3o也沒(méi)有出現(xiàn)副反應(yīng)。底物3p和3z的產(chǎn)物出現(xiàn)了區(qū)域選擇性產(chǎn)物。醛和酮與含氮相比堿性更弱，少見(jiàn)作為C-H活化的底物，但在富電子的芳香環(huán)上，這個(gè)方法可以生成3q和3s。稠環(huán)芳香烴，可以選擇性的在1-位甲基化。然而，酯和羧酸不適用該體系。金華2-甲基四氫呋喃多少錢(qián)一個(gè)</p><p style="text-indent:25px">上海蔚云化工有限公司是一家化工產(chǎn)品（除危險(xiǎn)化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、化工機(jī)械設(shè)備及配件的銷(xiāo)售，在化工技術(shù)領(lǐng)域內(nèi)從事技術(shù)開(kāi)發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)服務(wù)、技術(shù)咨詢(xún)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】的公司，是一家集研發(fā)、設(shè)計(jì)、生產(chǎn)和銷(xiāo)售為一體的專(zhuān)業(yè)化公司。上海蔚云化工作為化工產(chǎn)品（除危險(xiǎn)化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、化工機(jī)械設(shè)備及配件的銷(xiāo)售，在化工技術(shù)領(lǐng)域內(nèi)從事技術(shù)開(kāi)發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)服務(wù)、技術(shù)咨詢(xún)。【依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】的企業(yè)之一，為客戶(hù)提供良好的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。上海蔚云化工致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶(hù)產(chǎn)品上的貼心，為用戶(hù)帶來(lái)良好體驗(yàn)。上海蔚云化工始終關(guān)注化工市場(chǎng)，以敏銳的市場(chǎng)洞察力，實(shí)現(xiàn)與客戶(hù)的成長(zhǎng)共贏。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2652843.html</p></div></div></div></div></div><div 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